[time-nuts] New Member / Z3801

Azelio Boriani azelio.boriani at gmail.com
Sun Jan 17 12:23:31 EST 2016


Welcome,
you hit the usual GPS week rollover issue, see these:
<http://www.leapsecond.com/notes/gpswnro.htm>
<https://www.febo.com/pipermail/time-nuts/2011-December/061725.html>
No impact on the 10MHz/PPS accuracy.
No command can correct the rollover, I seem to remember that if you
set the date before the GPS has a fix (right after a power cycle),
then the date will be correct (until the next power cycle).
There is also this software:
<http://www.ulrich-bangert.de/Z38XX.zip>

On Sun, Jan 17, 2016 at 3:59 PM, Artek Manuals <Manuals at artekmanuals.com> wrote:
> Hi guys
>
> Dave at ArtekManuals.com here. Long time electronics enthusiast/tinkerer/
> ham radio op.
> Recently moved and am in the process of setting up my long dreamed of a
> planned electronics lab and radio shack (NR1DX).
>
> At the heart of the lab is a HP Z3801 GPSDO to provide  an external 10MHz
> frequency reference. I bought the unit about 15 years ago but it has been in
> environmentally controlled storage ever since. Serial prefix is 3517Axxxxx
> and I am running this on a +54VDC supply. Upon firing the Z3801 up, the
> first conundrum I am running into is that the unit does not seem to support
> setting the date above 12/31/2007. Sometimes during the survey mode it will
> automatically set the correct 2016 date , other times during the survey the
> date stays stuck on 1996. The unit tracks the satellites and mostly settles
> in around 1 second PPS at +/- 20ns with a holdover of 4 to 8us. More about
> the "mostly" comment in a later post.
>
> On the surface the actual reported date is not a big deal for me. as long as
> the date is not critical to the GPSDO function? The engineer in me would
> like to be able to set the date correctly ......just because. When
> attempting to set the using GPS:INIT:DATE I get an E-222 error (data out of
> range).
>
> So here are my initial questions.
> 1) I assume that the date thing is a firmware issue? Is there updated
> firmware out there that allows dates above 2007, 12, 31?
> 2) If all I care about is 10MHz accuracy, do I need to care about the date?
> 3) Is there a different command string I should be using?
> 4)Software: I am running HP SATSTAT and Z38XX on a WIN-XP/32 laptop ...IS
> there something better (or different) I should be running in the way of FREE
> software? I looked at the GPSCon package and so far questions about support
> for the software and portability eventually to WIN-10 supported have gone
> unanswered (not a good sign)
>
> Finally I am sure that the above have been addressed on older posts, but I
> gave up searching in frustration.  Is there an easy way to search the ENTIRE
> list archive. It seems that the archives must be queried one month at time
> which is REALLY TEDIOUS
>
> Dave
> NR1DX
> ArtekManuals.com
>
> --
> Dave
> Manuals at ArtekManuals.com
> www.ArtekManuals.com
>
>
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